A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 472
to be addedor subtracted. The trigonometrical signs of the sines must beattended to. The log. sin. 1 = 4-6855749. Instead of divid-ing by sin. 1, the correction without it, which will be a verysmall fraction, may be reduced to seconds by multiplying it by206265. Example. Let E D L = 32° 20 18-06 ;… … must be diminished by 2,363//, to reduce it to the desired angleRCL. Much calculation may be saved by taking the station D so thatall the signals to be observed can be seen from it. Then only asingle distance and angle of direction need be meas-ured. It may also happen that the center, C, of…
Surveying
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